The Research Of The Nanostructure Metal Oxide Semiconductor Materials And Its Photocatalytic Properties

With the rapid development of industrial production, a large number of emissions, waste continuously into the natural world, so that the deteriorating human living environment poses a serious threat to human health and life, so to change human beings are facing a major issue be solved. Metal semiconductor photocatalytic nano-materials technology is a historical background to develop.Preparation of metal oxide nanomaterials characterization and application of performance, since the birth of nanotechnology is nanomaterials, has been one of the hotspots. The most important semiconductor nano is one of the unique features of photocatalysis, this paper, the metal oxide semiconductor research overview on the existing problems and future trends for a brief Fa Zhan's analysis, the content, including optical Preparation, mechanism of photocatalytic semiconductor defects, solutions, and application of research. Photocatalyst, including physical methods and chemical method; nm semiconductor defects are (1) wide band gap, can only absorb UV light, but no response in the visible range, low utilization of the sunlight. (2) photo-carrier complex high photocatalytic efficiency is low. These disadvantages severely restrict the practical application of technology. If by modified TiO₂ photocatalyst, its Photocatalytic activity, to respond to extended to the visible wavelength range, will certainly be greatly improved utilization of the sun too, for the industrial application of photocatalyst Tourushiji open road. Metal ion doping is that nano TiO₂ photocatalyst effective means of visible light, into the twenty-first century, access to the rapid development of nanotechnology, which Photocatalytic technology can directly use of sunlight as a light source and as a kind of ideal pollution control technology, in addition can also be used in industry, agriculture, medicine and other fields, highlighting its broad development prospects.Overall, metal semiconductor nano-materials with special optical absorption, carrier is easy to separate, larger surface area than other characteristics, especially chemical and optical properties of TiO₂ with stability, high chemical activity, resistance to chemical corrosion and heat resistance low cost, non-toxic, abundant source of the characteristics of nano-TiO₂ photocatalyst thus the research become a hotspot, is considered the most promising one of the green catalyst.The a lot of experience and materials have been accumulated in the past research ,and a lot of rational knowledge have been collected. However, at present, the utilization efficiency of catalysts and solar energy is very low, has been developed and the use of photocatalytic products do not satisfied , this paper is discuss this question about photocatalysis and proposed for future for this technology prospects.